diff --git a/stubs/dockerfile-parse/dockerfile_parse/__init__.pyi b/stubs/dockerfile-parse/dockerfile_parse/__init__.pyi
index eeb43a016..53ccc597c 100644
--- a/stubs/dockerfile-parse/dockerfile_parse/__init__.pyi
+++ b/stubs/dockerfile-parse/dockerfile_parse/__init__.pyi
@@ -1,3 +1,5 @@
+from typing import Final
+
 from .parser import DockerfileParser as DockerfileParser
 
-__version__: str
+__version__: Final[str]
diff --git a/stubs/dockerfile-parse/dockerfile_parse/constants.pyi b/stubs/dockerfile-parse/dockerfile_parse/constants.pyi
index 9bf1c78f3..9453a8eff 100644
--- a/stubs/dockerfile-parse/dockerfile_parse/constants.pyi
+++ b/stubs/dockerfile-parse/dockerfile_parse/constants.pyi
@@ -1,2 +1,4 @@
-DOCKERFILE_FILENAME: str
-COMMENT_INSTRUCTION: str
+from typing import Final
+
+DOCKERFILE_FILENAME: Final = "Dockerfile"
+COMMENT_INSTRUCTION: Final = "COMMENT"
diff --git a/stubs/dockerfile-parse/dockerfile_parse/util.pyi b/stubs/dockerfile-parse/dockerfile_parse/util.pyi
index a15048eb1..5ad32c378 100644
--- a/stubs/dockerfile-parse/dockerfile_parse/util.pyi
+++ b/stubs/dockerfile-parse/dockerfile_parse/util.pyi
@@ -19,7 +19,7 @@ class WordSplitter:
     escaped: bool
     def __init__(self, s: str, args: Mapping[str, str] | None = None, envs: Mapping[str, str] | None = None) -> None: ...
     def dequote(self) -> str: ...
-    def split(self, maxsplit: int | None = None, dequote: bool = True) -> Generator[str | None, None, None]: ...
+    def split(self, maxsplit: int | None = None, dequote: bool = True) -> Generator[str | None]: ...
 
 def extract_key_values(
     env_replace: bool, args: Mapping[str, str], envs: Mapping[str, str], instruction_value: str